why the viscosity change.. - Nissan Murano Forum
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post #1 of 3 Old 04-18-2019, 11:40 PM Thread Starter
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why the viscosity change..

I had a 2005 Murano for 160000 miles.. that version used 5/30 oil.
Now.. we have a 2015 platinum.. they recommend 0/20
pretty much the same motor .....so why the viscosity change. Just to MAYBE increase MPG?
I'd think the protection might take a slight hit...
opinion?

Timing is EVERYTHING...
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post #2 of 3 Old 04-19-2019, 08:51 AM
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Originally Posted by Kafka45 View Post
I had a 2005 Murano for 160000 miles.. that version used 5/30 oil.
Now.. we have a 2015 platinum.. they recommend 0/20
pretty much the same motor .....so why the viscosity change. Just to MAYBE increase MPG?
I'd think the protection might take a slight hit...
opinion?
The engine is the same family, but a different version with tighter tolerances, hence the lighter oil.


Yes, with the tighter tolerances, a increase of 5 points in viscosity will increase resistance in the motor, affecting gas milage.


The only thing that will be suspectial to excessive wear is the rod and crank bearings. Any drop in oil pressure will immeditally start to wear them with the thinner oil at high revs.


Have a good day.


PS I believe the new tow limit of 1750 lbs is due to having to use the thinner oil. Pulling a load puts more then normal pressure on the rod & crank bearings. I've noticed that most of the current manufacturers SUVs using 0/20 or even 0/16 all have reduced their towing limit to 1750 lbs.
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post #3 of 3 Old 04-19-2019, 10:58 AM Thread Starter
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thanks.

thanks for the info.... If I can get this CVT to go as long as the other one I'll be ecstatic. (I realize the CVT isn't related to my oil question).

Timing is EVERYTHING...
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